Definition of "neologism" in English

noun

1. (linguistics, lexicography, countable) A word or phrase which has recently been coined; a new word or phrase.

2. (linguistics, lexicography, countable, by extension) An existing word or phrase which has gained a new meaning.

3. (linguistics, uncountable) The act or instance of coining, or uttering a new word.

4. (psychiatry) The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.

5. (theology, historical) Synonym of neology.